/Engine/Source/Runtime/Engine/Classes/Engine/World.h
Jumps the server to new level. If bAbsolute is true and we are using seamless traveling, we will do an absolute travel (URL will be flushed).
bool ServerTravel ( const [FString](API\Runtime\Core\Containers\FString) & InURL, bool bAbsolute, bool bShouldSkipGameNotify )